Sash-lock.



PATENTED JUNE 13, 1905.

J. E. MGKUSIGK.

SASH LOCK.

YAPPLIOATION FILED SEPT.23,1904.

11 nvemor witnesses fittorneg NITED STATES Patented June 13, 1905.

PATENT Orrics.

SASH-LOCK- SPECIFICATION forming part of Letters Patent No. 792,067, dated June 13, 1905. Application filed September 23, 1904. Serial No. 225,670.

To all whom, it Duty concern:

Be it known that 1, JAMES E. MoKUsIoK, a citizen of the United States, residing at Denver, in the county of Denver and State of Oolorado, have invented new and useful Improvements in Sash-Locks, of which the following is a specification.

My invention pertains to sash-locks, and its novelty, utility, and practical advantages will be fully understood from the following description and claims when taken in connection with the accompanying drawings, forming part of this specification, in which Figure l is a view, partly in front elevation and partly in vertical section, illustrative of the arrangement of my improvements relative to a sash-frame and upper and lower sliding sashes therein when the sashes arelocked. Fig. 2 is an enlarged perspective view illustrating the locking mechanism complementary to one side stile of the sash-frame with the parts of said mechanism in the same relative positions as in Fig. 1, and Fig. 8 is a perspective view of the cover which is arranged over said mechanism with a View of preventing the same from interfering with the free movements of the counterbalance-weights and cables usually employed in connection with sliding sashes. Fig. at is a detail view of the bearing (Z at the right of Fig. 2, and Fig. 5 is a similar view illustrating that portion of the rock-shaft a that is journaled in the said bearing.

Similar letters designate corresponding parts in all of the views of the drawings, referring to which A is a sash-frame, which in general may be of the ordinary construction or any other construction compatible with the purposes of my invention.

B is a lower sliding sash arranged in guides in the side stiles of the sash-frame. O is an upper sliding sash arranged in other guides in the said side stiles.

D D are the usual counterbalance-weights for facilitating raising of the sashes B and (J.

E E are cables arranged over the usual sheaves E in the sash-frame and connecting the sashes and the weights, which latter are of course arranged at the opposite sides of I the side stiles of the frame with respect to the sashes.

G is the locking mechanism complementary to one side stile of the frame and arranged to be used in connection with the lower sash B. G is the locking mechanism complementary to the other side stile and arranged to be used in connection with the other sash, O, and H I are covers arranged over the mechanisms G and G, respectively, in order to prevent said mechanisms from interfering with the play of the weights and cables heretofore mentioned.

As best shown in Fig. 1, the lower sash B is provided in the outer side of one of its side bars with a plurality of recesses a, the upper and lower walls of which are preferably, although not essentially, square, while the upper sash O is provided in the outer side of one side bar with a plurality of recesses b, the lower walls 0 of which are partially beveled. The recesses a are preferably provided in the lower sash B in order to render it necessary to operate the locking mechanism when it is desired to either raise or lower the said sash B, and the recesses b are provided in the upper sash C, so that the said sash may be raised but not lowered without the necessity of operating the locking mechanism G.

The locking mechanism G comprises bearings (Z, fixed to one side stile of the sashframe; a rock-shaft e, journaled in said bearings and having oppositely-disposed crank arms f g; a barrel-casing 71/, fixed in the side stile,Fig. l; a push-rod i, pivoted to the arm f and extending through the casing it and having an enlargementj; a link 70, pivoted to and extending upwardly from the arm 9 and guided in a bracket Z, fixed to the side stile; a dog m, pivoted on the upper portion of the link it and extending through an opening a in the side stile, and a coiled spring 2), arranged in the barrel-casing /2, and around the push-rod 2: and interposed between the enlargement j of said rod and one end of said casing 7L. By virtue of the spring 1) the dog m is normally held in the position shown, and hence it will be seen that the said dog coacting with the recessesb in sash 3 will hold the said sash against downward movement while permitting upward movement thereof, this latter because of the lower beveled walls 0 of said recesses .7). I'Vhen, however,it is desired to lower the sash C, it is simply necessary to press the rod outwardly, when the arm 7 of the rockshaft G will be swung outwardly and upwardly and the arm 9 of said shaft will be swung inwardly and downwardly, while the link 7r will be drawn downwardly by said arm g and the dog on will be drawn downwardly by the link 1,. hen the dog m is thus drawn downwardly, its inner end will be carried downwardly from the upper wall of the recess 7), and when it brings up against the bottom wall of the opening 72. its said inner end will be swung outwardly, so as to enable the recessed sash to clear the same. To look the sash, pressure is removed from the push-rod i, when the spring p will return the parts to the positions shown in Figs. 1 and 2. In this connection it will be noticed that on the down and up movements of the link I: said link Will rock as on a fulcrum in the guide Z, the up per portion of said link swinging outwardly on the down movement thereof and inwardly on the up movement.

As shown in Figs. sand 5, one of the bearings (Z contains a removable block d, which extends from the aperture (Z of the bearing to the back edge thereof and is designed to permit of the intermediate portion 0 of shaft 0, which portion (2 is of circular form in crosssection, being journaled in the said aperture (Z of the bearing. hen the said bearing (Z is connected to the side stile of the sash-frame, the block (2 will be confined between the stile and the shaft portion 0 and also between the comparatively large portions of shaft 0, and thereby held against displacement.

The locking mechanism G is similar in construction to the mechanism Gr, except that it is inverted that is, its link 74; extends downwardly instead of upwardly from its shaft 0 and its dog m is arranged at the lower instead of the upper end of the link. Said locking mechanism G because of the recesses a in the lower sash B is adapted to normally lock the said sash against both upward and downward movement.

-The covers II I are by preference each formed of one piece of metal, are connected to the side stiles of the sash-frame A, and are respectively provided with outer curved walls (1 r. In virtue of these outer curved walls 1 r the covers HI serve to protect the mechanisms Gr G and prevent the same from interfering with the up and down movements of the counterbalanceweights, which are obviously adapted to slide over the curved walls.

It will be readily appreciated from the foregoing that my improvements are simple, inexpensive, and durable, and are calculated to effectually prevent a person at the outer side of a window from lowering the upper sash or raising the lower sash, while permitting a person at the inner side of the window to conveniently release and adjust either sash.

I have entered into a detailed description of the construction and relative arrangement of the parts embraced in the present and preferred embodiment of my invention in order to impart a full, clear, and exact understanding of the said embodiment. I do not desire, however, to be understood as confining myself to such specific construction and relative arrangement of parts, as such changes or modifications may be made in practice as fairly fall within the scope of my invention as claimed.

Having described my invention, what I claim, and desire to secure by Letters Patent,

1. In a sash-lock, the combination of a sashframe, a slidable sash arranged in the frame and having recesses in one of its side bars, and a locking mechanism carried by one of the side stiles of the frame, and comprising bearings and a guide-bracket fixed to said stile, a casing extending through the stile, a pushrod arranged in the casing and having an enlargement, a spring arranged in the casing and interposed between the same and an enlargement on the push-rod, a rock-shaft journaled in the bearings and having oppositely-disposed crank-arms one of which is connected to the push-rod, a link connected to the other crank arm and extending through the guide-bracket, and a dog pivoted to the link and arranged to work through an opening in the stile and engage the recesses in the sash.

2. In a sash-lock, the combination of a sashframe, a slidable sash arranged in the frame and having one or more recesses in one of its side bars, and a locking mechanism carried by one of the side stiles of the frame, and comprising a push-rod, a spring for normally holding the push-rod in one position and returning it to such position, a rock-shaft having oppositely-disposed cranks one of which is connected to the push-rod, an endwisc-movable link connected to the other crank-arm of the rock-shaft, and a dog pivoted on the link and arranged to engage a recess of the sash.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

J AMES E. MOKUSIOK. lVitnesses:

FRANK J As'rnn, HOMER JoirNsToN. 

